Can anyone clarify the lot numbering system used on post-WWII European NATO small-caliber cannon ammunition? Here are a couple of examples:
From a 20x139mm cartridge: RH-380
From a 35x228mm cartridge: PSW-1-114-X
The first one seems pretty straightforward - Rheinmetall lot 380. The second one I assume is lot 114 from Press und Stanzwerke, but what do the number 1 and the letter X represent?
Is there any reference that lists date ranges for the various manufacturers’ lot numbers? At what point it time did they switch from the single-number to the multiple-number format?
I’ve also seen examples that use the current US-style lot numbering system, e.g. DAG97A001-001. Is this now the standard used on European (NATO) military ammunition, or is it used only for export/contract ammunition?
Thanks in advance!